The MassTransit Engine may inadvertently shut down, and will not properly restart. Within the Application Log of the Windows Event Viewer, the following error message may be displayed:

SA_Exception[xxxx]: DB_Files_Edit: Incorrect key file for table 'tablename'; try to repair it.
Commonly, tablename may be referenced as 'dfiles'


Activation makes sure you are using Acronis Backup in the compliance with Acronis Licensing Policy and Acronis end user license agreement (EULA) [pdf]. In most cases, one purchased Acronis Backup license key allows protection of one physical machine.

This article describes how to change the delay time and key for starting Acronis Startup Recovery Manager.

This article is intended for Acronis Cyber Infrastructure administrators using Acronis Cyber Infrastructure in combination with Acronis Backup Cloud, Acronis Backup Advanced 12.5, or as a general-purpose storage. This article explains how to generate, install and use SSH keys to connect Acronis Cyber Infrastructure in Windows environment using popular third-party tool PuTTY. 

This article describes ugrade procedure from Acronis True Image OEM versions.

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Acronis True Image 2020 Editions

Create special registry keys to fix this issue


  1. After you install Acronis Backup 12.5 on the machine, certain USB drives/keys are not instantly detected. It takes 2-5 minutes for the drive to acquire a letter and be accessible in Windows Explorer.
  2. If you stop Acronis Managed Machine service, the same USB drives are detected instantly.


Hardware incompatibility: some specific devices incorrectly process standard commands issued by Acronis product components.

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